What Othman did to the Qur'an will always be under suspicion and accusation, since he burnt all the other copies that were existent at the time. Why the copies were prior to Othman's copy, which included Zaid's copy, destroyed, if they were consistent with the unified text of Othman? And if it was at variance with it and thus was burnt, how can we trust Othman's version while he did not trust those of Abu Bakr, Omar and Ali?
Their scholars of Tradition and exposition, such as Ali Ibn Ibrahim, his disciple al-Kalleeni, al-Ayyaashi and al-Tubrusi, are all of the opinion that the Qur'an currently circulating among of the Muslims is not the whole Qur'an!
Black skin and Judgment Day:
On the Day when (some) faces will be whitened and (some) faces will be blackened; and as for those whose faces have been blackened, it will be said unto them: Disbelieved ye after your (profession of) belief? Then taste the punishment for that ye disbelieved. (Âl 'Imran 3:106)
And on the Day of Resurrection thou (Muhammad) seest those who lied concerning Allah with their faces blackened. Is not the home of the scorners in hell? (Az-Zumar 39:60)
Muslims usually try to understand these verses as being metaphorical without racist connotations.
However, there are some hadiths that link black skin and creation with judgment day:
Abu Darda' reported God's messenger as saying, "God created Adam when He created him and struck his right shoulder and brought forth his offspring white like small ants. And he struck his left shoulder and brought forth his offspring BLACK as though they were charcoal. Then He said to the party on his right said, 'To paradise, and I do not care', and He said to the party in his left shoulder 'To hell, and I do not care'." Ahmad transmitted it. (Mishkat Al Masabih, English translation with explanatory notes by Dr. James Robson [Sh. Muhammad Ahsraf Publishers, Booksellers & Exporters, Lahore-Pakistan, Reprint 1990], Volume I, Chapter IV, Book I.- Faith, pp. 31-32)
Narrated AbudDarda'
Allah's Messenger (peace be upon him) said: Allah created Adam when He had to create him and He struck his right shoulder and there emitted from it white offspring as if they were white ants. He struck his left shoulder and there emitted from it THE BLACK OFFSPRINGS as if they were charcoal. He then said (to those who had been emitted) from the right (shoulder): For Paradise and I do not mind. Then He said to those (who had been emitted) from his left shoulder: They are for Hell and I do not mind.
Transmitted by Ahmad. (Al-Tirmidhi Hadith, Number 38- ALIM CD ROM Version)
For these traditions, it is much harder to resist the impression of racist overtones. They do not speak about people being whitened or blackened at the time of judgment, but link their original skin colour with their eternal destiny, i.e. Allah decreed that blacks will enter hell in contrast to whites. In fact, other narrations even command that any person claiming that Muhammad was black be put to death!
Ahmad ibn Abi Sulayman, the companion of Sahnun, said, "Anyone who says that the Prophet was black SHOULD BE KILLED." (Muhammad Messenger of Allah (Ash-Shifa of Qadi 'Iyad), Qadi 'Iyad Musa al-Yahsubi, translated by Aisha Abdarrahman Bewley [Madinah Press, Inverness, Scotland, U.K. 1991; third reprint, paperback], p. 375; capital emphasis ours)
Ahmad ibn Abi Sulayman, Sahnun's companion, said that whoever says that the Prophet was black IS KILLED. The Prophet was not black. (Ibid., p. 387; capital emphasis ours)